Finding the Third Proportional to 28,718 and 60,915

Step by Step Solution

1. Step 1: Write the proportion equation
   28,718 : 60,915 = 60,915 : x
2. Step 2: Convert to fraction form
   28,718/60,915 = 60,915/x
3. Step 3: Cross multiply
   28,718x = 60,915 × 60,915
4. Step 4: Simplify right side
   28,718x = 3,710,637,225
5. Step 5: Solve for x
   x = 3,710,637,225/28,718
6. Step 6: Final answer
   x = 129,209.46